A welcome bonus is a betting amount that players receive when they are new to a casino. It is awarded either for just signing up or for making the first (several) deposits. A welcome bonus is a great way for players to accustom themselves to an online casino without spending real money.
For those who are looking for a diver's paradise then they are looking for the Cayman Islands. This is a region that was known for its prohibition of all forms of gambling. Recently there has been some talk about changing this which would open up opportunities for mobile online gambling for residents.